Well had to call the RAC this morning as it was back to doing its usual antics....
After much deliberation and speaking to the missus and getting running is that the anti shudder valve is the culprit more so when the missus told him that the other day when she was out driving and stopped behind another car the engine had stopped..

That again give him the thought that the anti shudder valve is looking more n more likely...

So it is now with our mechanic he dismantle it all and throughly clean it and build it all back up......